Help with Naomi


I tried Demul, and it says "unable to find bios file in Naomi" even though the file is there.
I am trying to get Sega Naomi to work on my system, but I keep getting errors. I have tried to use NullDC but it does nothing. I try to load a game, but goes to "initializing 3d renderer and stops.
So I tried Makaron which I do like better... but when I load a Rom O get this message "Data error 1006 in module Naomi Winmaim-Naomi.Glownpetla
I have tried every bios I can find for Naomi, but nothing seems to work.
I am wondering if the issue is with direct draw, but I have the latest directx installed.
Any help would be greatly appreciated.